Lambda-11 (stylized as Λ -No.11-) is a character in the BlazBlue series. Her Drive, Sword Summoner EX, allows Lambda-11 to summon sword projectiles forward, which she can shoot at different angles, and can be chained together.
In the story, Lambda-11 is an imitation of the Murakumo Units, built by Relius Clover and later modified by Kokonoe. Although she dies at the hands of Yuuki Terumi while trying to save Ragna the Bloodedge, she was later resurrected inside the Embryo.
Due to Nu-13's death in BlazBlue: Calamity Trigger, Nu-13 did not appear in BlazBlue: Continuum Shift series and was replaced with Lambda-11. When she returned in BlazBlue: Chrono Phantasma, she became a stance character who could switch between her and Lambda's moves. She reverted back to her BBCT moveset starting with BlazBlue: Chrono Phantasma Extend, due to Lambda-11 returning to the roster. Here, she is considered her own character, gaining new moves that she can call her own.